Compact disc

digital optical disc data storage format

flat and usually circular disc which encodes binary data, primarily used for physical data distribution and long-term archival

A CD-ROM (, compact disc read-only memory) is a type of read-only memory consisting of a pre-pressed optical compact disc that contains data computers can read, but not write or erase. Some CDs, called enhanced CDs, hold both computer data and audio with the latter capable of being played on a CD player, while data (such as software or digital video) is only usable on a computer (such as ISO 9660 format PC CD-ROMs).

optical home video format

read-only optical disc for high-fidelity audio storage

CD-R (Compact disc-recordable) is a digital optical disc storage format. A CD-R disc is a compact disc that can only be written once and read arbitrarily many times.

thumb|Logo of Compact Disc-ReWritable (CD-RW). thumb|CD-RW with distinctively darker data surface than a CD-R and a factory-pressed [[CD-ROM.]]

file system for CD-R and CD-ROM optical discs

The Compact Disc-Interactive (CD-I, later CD-i) is a digital optical disc data storage format as well as a hardware platform, co-developed and marketed by Dutch company Philips and Japanese company Sony. It was created as an extension of CDDA and CD-ROM and specified in the Green Book specifications, co-developed by Philips and Sony, to combine audio, text and graphics. The two companies initially expected to impact the education/training, point of sale, and home entertainment industries, but the CD-i is largely remembered today for its video games.

music single in the form of a standard size compact disc

LightScribe is an optical disc recording technology that was created by the Hewlett-Packard Company. It uses specially coated recordable CD and DVD media to produce laser-etched labels with text or graphics, as opposed to stick-on labels and printable discs. Although HP is no longer developing the technology, it is still maintained and supported by a number of independent enthusiasts.

CD with a smaller diameter and one third the storage capacity of a standard 120 mm disc

file format

format of optical media disc introduced in 1987, combining the technologies of standard compact disc and LaserDisc

CD+G (also known as CD-G, CD+Graphics, and TV-Graphics) is an extension of the compact disc standard that enables the display of low-resolution graphics alongside audio content when played on a compatible device. This functionality is most commonly associated with karaoke systems, which use CD+G discs to display on-screen lyrics synchronized with music playback. The CD+G format was defined by Philips and Sony as an extension of the Red Book specification for audio CDs.

CD-Text is an extension of the Red Book Compact Disc specifications standard for audio CDs. It allows storage of additional information (e.g. album name, song name, and artist name) on a standards-compliant audio CD.

right|200px thumb|A Labelflash disc engraved with an image of the planet Jupiter. Labelflash (sometimes written LabelFlash) is a technology which allows users to burn custom designs or images onto proprietary DVD media first announced in October 2005 as a collaboration between Yamaha and Fujifilm. While Yamaha developed the optical drives, Fujifilm manufactured the proprietary Labelflash optical discs. NEC manufactured the first Labelflash compatible drive, the ND4551, which was released in December 2005.

classification system for commercial compact disc releases developed by the Society of Professional Audio Recording Services (SPARS)

audio media format

system designed by Kodak for digitizing and saving photos in a CD

company

REDIRECT Compact disc#SHM-CD

thumb|upright=1.3|A DiscT@2-engraved disc. The label can be seen coexisting with the data on the data side of the disc.|alt= thumb|right|The DiscT@2 logo DiscT@2 (read as "disc tattoo") is a method of writing text and graphics to the data side of a CD-R or DVD disc first introduced by Yamaha in 2002. While often compared with the later LabelFlash and LightScribe technologies, which also offered users consumer-grade computerized disc labeling, DiscT@2 is different in that it required no proprietary media and wrote the graphics to the data side of the disc.

Compact disc manufacturing process

type of optical disc packaging

The pregap on a Red Book audio CD is the portion of the audio track that precedes "index 01" for a given track in the table of contents (TOC). The pregap ("index 00") is typically two seconds long and usually, but not always, contains silence. Popular uses for having the pregap contain audio are live CDs, track interludes, and hidden songs in the pregap of the first track (detailed below).

non-circular type of compact disc

filename extension